Oil Well Drilling Tools - All specifications circulating sub API standard Introduction Circulating sub is installed in the top of drilling stem. The upper thread is connected with circulating system of casing, ... Read More
Short Catch Overshot for Fishing Tubing, Drill Pipe, Sucker Rod Short catch overshot is used for catching short length fish which the stuck point is closed or above the coupling, such as tubing, drill pipe, ... Read More
